
ÊÛǰµç»°
135-3656-7657
ÊÛǰµç»° : 135-3656-7657
¹ú¼Ò¸ßм¼ÊõÆóÒµ Ê¡¼¶×¨¾«ÌØÐÂÆóÒµ
×ÉѯÈÈÏߣº135-3656-7657 400-6333-661
ÊÍ·ÅË«ÑÛ£¬´øÉ϶ú»ú£¬ÌýÌý¿´~£¡
00:00
00:00
ÔÚ¹âÏ˽ÓÈë¼¼ÊõÖУ¬ÓÉÓÚÎÞÔ´¹âÍøÂç(PON)¾ßÓгɱ¾µÍ¡¢¶ÔÒµÎñ͸Ã÷¡¢Ò×ÓÚÉý¼¶ºÍ¹ÜÀíµÈÓÅÊÆµÃµ½ÁË´óÁ¦·¢Õ¹ºÍÍÆ¹ãÓ¦Óã¬ÕýÔÚ½ÓÈëÍøÖаçÑÝ×ÅÔ½À´Ô½ÖØÒªµÄ½ÇÉ«¡£¸ÅÀ¨À´½²£¬¸ù¾Ý½ÓÈëÐÒéµÄ²»Í¬£¬PON·ÖΪ»ùÓÚATMµÄAPON¡¢»ùÓÚEthernetµÄEPONºÍ»ùÓÚGEM(GPON·â×°¸ñʽ)µÄGPONÈýÖÖÀàÐÍ¡£½ü¼¸ÄêÀ´Ëæ×ÅIPÒµÎñµÄѸËÙÔö³¤£¬±»ÊÂʵ֤Ã÷ÊdzÐÔØIPÊý¾Ý°ü×î¼ÑÔØÌåµÄÒÔÌ«Íø¼¼ÊõÕýÊܵ½Ô½À´Ô½¶àµÄ»¶Ó¡£ÓÉÒÔÌ«ÍøÓëPON½áºÏ¶ø²úÉúµÄÒÔÌ«ÍøÎÞÔ´¹âÍøÂç(EPON)ÒòΪͬʱ¾ß±¸ÒÔÌ«ÍøºÍPONµÄÓŵ㣬³ÉΪFTTHÖеÄÈÈÃż¼Êõ¡£
1.EPONµÄϵͳ½á¹¹
EPON²ÉÓõ㵽¶àµãµÄÍøÂçÍØÆË½á¹¹£¬ÔÚPONÉÏ´«ËÍÒÔÌ«ÍøÖ¡£¬ÀûÓùâÏËʵÏÖÓïÒô¡¢Êý¾ÝºÍÊÓÆµµÈ¶àýÌåȫҵÎñµÄ½ÓÈ롣ͼ11.19ÊÇÒ»¸öµäÐ͵ÄEPONÊ÷ÐÍ·ÖÖ§½á¹¹£¬Ö÷ÒªÓɹâÏß·ÖÕ¶Ë(OLT)¡¢¹â·ÖÅäÍøÂç(ODN)ºÍ¹âÍøÂçµ¥Ôª/¹âÍøÂçÖÕ¶Ë(ONU/ONT)Èý²¿·Ö×é³É¡£ÆäÖÐOLTλÓÚ¾Ö¶Ë£¬ONU/ONTλÓÚÓû§¶Ë¡£ONU/ONTµÄÇø±ðΪONTÖ±½ÓλÓÚÓû§¶Ë£¬¶øONUÓëÓû§¼ä»¹ÓÐÆäËûµÄÍøÂ磬ÈçÒÔÌ«Íø¡£
ͼ19 EPONϵͳ½á¹¹
ÔÚEPONÖУ¬OLT¼È¾ßÓн»»»»ú/·ÓÉÆ÷µÄ¹¦ÄÜ£¬ÓÖÊÇÒ»¸ö¶àÒµÎñÌṩƽ̨¡£ÔÚÏÂÐз½Ïò£¬ËüÌá¹©ÃæÏòÎÞÔ´¹âÍøÂçµÄ¹âÏ˽ӿڣ»ÔÚÉÏÐз½Ïò£¬Ìṩ¶à¸ö¸ßËÙ(ÈçGbit/sºÍ10Gbit/s)ÒÔÌ«Íø½Ó¿Ú¡£ÎªÖ§³ÖÆäËûÁ÷ÐÐÐÒ飬OLT»¹Ö§³ÖTDM/PSTN¡¢ATM¡¢FRÒÔ¼°SDH/SONETµÄ½Ó¿Ú±ê×¼¡£ÁíÍ⣬×÷ΪEPONµÄ¿ØÖÆÖÐÐÄ£¬OLT³ýÁËÌá¹©ÍøÂ缯ÖкͽÓÈ빦ÄÜÍ⣬»¹¿ÉÒÔ¸ù¾ÝÓû§ÒªÇóʵÏÖ´ø¿í·ÖÅä¡¢ÍøÂ簲ȫºÍ¹ÜÀíÅäÖõȹ¦ÄÜ¡£
ODNÓÉÎÞÔ´¹â·Ö·Æ÷(POS)ºÍ¹âÏË×é³É£¬ÓÃÓÚʵÏÖOLTÓë¶à¸öONUÖ®¼äµÄÁ¬½Ó¡£POSÎÞÐëµçÔ´¡¢½á¹¹¼òµ¥£¬¿ÉʵÏÖ8¡¢16¡¢32¡¢64¡¢128µÈ·Ö¹âÂÊ£¬²¢¿É¶à¼¶¼¶Áª¡£Ò»°ã´ÓOLTµ½ONUµÄ¾àÀë¿É´ï20km¡£
ONUΪÓû§ÌṩEPONµÄ½ÓÈ빦ÄÜ£¬áŠÓÃÒÔÌ«ÍøÐÒé¡£ÔÚÖдø¿íºÍ¸ß´ø¿íµÄONUÖÐʵÏÖÁ˵ͳɱ¾µÄÒÔÌ«ÍøµÚ¶þ²ã¡¢µÚÈý²ã½»»»¹¦ÄÜ¡£´ËÀàONU¿Éͨ¹ý²ãµþΪ¶à¸ö×îÖÕÓû§ÌṩºÜ¸ßµÄ¹²Ïí´ø¿í¡£ÓÉÓÚʹÓù²Í¬µÄÒÔÌ«ÍøÐÒ飬ÔÚͨÐŹý³ÌÖв»ÐèÒªÐÒéת»»£¬Òò´Ë¿ÉʵÏÖ¶ÔÓû§Êý¾ÝµÄ͸Ã÷´«ËÍ¡£Í¬Ê±£¬ONUÒ²Ö§³ÖÆäËû´«Í³µÄTDMÐÒ飬¶øÇÒ²»Ôö¼ÓÉè¼ÆºÍ²Ù×÷µÄ¸´ÔÓÐÔ¡£¶ÔÉÏÊö²»Í¬ÀàÐÍÐÒéµÄÖ§³Ö¿Éͨ¹ýÅäÖöà¸öÒÔÌ«ÍøºÍT1/E1½Ó¿ÚʵÏÖ¡£
EPONÖеÄOLTºÍËùÓÐONUÓÉÍøÔª¹ÜÀíϵͳ(EMS)¹ÜÀí£¬EMSÌṩÓëÒµÎñÌṩÕߺËÐÄÍøÂçÔËÐеĽӿڣ¬¿ÉʵÏÖÐÔÄܹÜÀí¡¢ÅäÖùÜÀí¡¢¼Æ·Ñ¹ÜÀí¡¢¹ÊÕϹÜÀíºÍ°²È«¹ÜÀíµÈ¹¦ÄÜ¡£
2.EPONµÄ¹¤×÷ÔÀí
ÔÚEPONÖУ¬¸ù¾ÝIEEE802.3ÒÔÌ«ÍøÐÒ飬´«Ë͵ÄÊǿɱ䳤¶ÈµÄÊý¾Ý°ü£¬×¿É´ï1500×Ö½Ú¡£ÏµÍ³áŠÓÃÏÂÐй㲥·¢ËÍ¡¢ÉÏÐÐʱ·Ö¶àÖ·½ÓÈë(TDMA)µÄ¹¤×÷»úÖÆ£¬ÆäÔÀíÈçͼ20Ëùʾ¡£
ͼ20 EPONÉÏÏÂÐд«ÊäÔÀíʾÒâͼ
µ±OLTÆô¶¯ºó£¬Ëü»áÖÜÆÚÐÔµÄÔÚ±¾¶Ë¿ÚÉϹ㲥ÔÊÐíONU½ÓÈëµÄʱ϶µÈÐÅÏ¢¡£ONUÉϵçºó£¬¸ù¾Ý´ËÐÅÏ¢·¢Æð×¢²áÇëÇó£¬OLTΪÆä·ÖÅäÒ»¸öΨһÂß¼Á´Â·±êʶ·û(LLID)¡£
ÔÚEPONÏÂÐз½ÏòÉÏ´«ÊäµÄÊÇÓɶà¸öÊý¾ÝÖ¡×é³ÉµÄÁ¬ÐøÐÅÏ¢Á÷£¬Ã¿Ö¡ÒÔͳ¼ÆÊ±·Ö¸´Óõķ½Ê½Ð¯´ø¶à¸ö³¤¶È¿É±äµÄÊý¾Ý°ü¡£Ã¿¸ö°üµÄ°üÍ·Öк¬ÓÐÄ¿µÄµØONUµÄ±êʶ·û£¬¼´Ç°ÊöONU×¢²áʱÓÉOLT·ÖÅäµÃµ½µÄÂß¼Á´Â·±êʶ·û¡£´ËÍ⣬ÓÐЩ°ü¿ÉÄÜÒª´«Ê䏸ËùÓÐONU(¹ã²¥)»òÕßÖ¸¶¨µÄÒ»×éONU(×é²¥)¡£ÏÂÐÐÐÅÏ¢Á÷»á´«Ê䵽ÿһ¸öONU,¸÷ONUÖ»½ÓÊÕÊôÓÚ×Ô¼ºµÄÊý¾Ý°ü¶ø¶ªÆúÆäËûµÄÊý¾Ý°ü¡£
ÔÚEPONÉÏÐз½ÏòÉÏ£¬ÀûÓÃTDMA¼¼Êõ£¬¸÷¸öONUµÄÉÏÐÐÊý¾Ý°üÔÚOLTÖ¸¶¨Ê±Ï¶ÄÚͨ¹ýÎÞÔ´¹â·Ö·Æ÷½øÈë¹²ÓùâÏË£¬ÒÔTDMÐÎʽ¸´ÓóÉÁ¬ÐøÐÅÏ¢Á÷´«Ë͵½OLT¡£ONUÔÚÖ¸¶¨Ê±Ï¶ÄÚ¿É·¢ËͶà¸ö³¤¶È¿É±äµÄÊý¾Ý°ü£¬Æä´ø¿íÊÇÓÉOLTÅäÖõģ¬ÈôáŠÓö¯Ì¬´ø¿íµ÷Õû¼¼Êõ£¬ÔòOLT¸ù¾ÝÖ¸¶¨µÄ´ø¿í·ÖÅä²ßÂԺ͸÷¸öONUµÄ״̬£¬¸øÃ¿Ò»¸öONU¶¯Ì¬·ÖÅä´ø¿í¡£ÓÉÓÚ¸÷¸öONUÖ»ÔÚ¸÷×ÔµÄÖ¸¶¨Ê±Ï¶ÄÚ·¢ËÍÊý¾Ý°ü£¬²»»á·¢ÉúÅöײ£¬Òò´Ë²»ÐèÒª´øÓгåÍ»¼ì²âµÄÔØ²¨¼àÌý¶à··ÃÎÊ£¨CSMA/CD£©»úÖÆ£¬´Ó¶ø¿ÉÒÔ³ä·ÖÀûÓôø¿í¡£
3.EPONµÄ¹Ø¼ü¼¼Êõ